I’m not sure if the phrase “pleading the fifth” may be an obscure reference for my non-American readers or not. Just in case: it refers to the 5th amendment of the American Constitution, which states that a person may legally decline to answer a question asked in a court of law or by other authorities if they feel answering the question may wrongly incriminate them. It’s to prevent people being tricked into falsely condemning themselves.
Or in Selkie’s case, refusing to admit her wrong-doing. 😉